Pipe-molding apparatus



A. O. BRUCE.

PIPE MOLDING APPARATUS.

No. 399,651. Patented Mar 19, 1889.

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AVERY O. BRUCE, OF SOUTH PITTSBURG, TENNESSEE.

PlPE WlQLDlNG APPARATUS.

SPECIFICATION forming part of Letters Patent No. 399,651, dated March19, 1889. Application filed October 17, 1887, Serial No. 252,622.(Model) To all whom it may concern.-

Be it known that I, AVERY G. BRUCE, a citizen of the United States,residing at South Pittsburg, in the county of Marion and State ofTennessee, have invented a new and use ful Mechanical Apparatus forForming Molds for Casting Pipes, of which the following is aspecification.

My invention relates to an improved apparatus for forming the bead atthe end of molds for casting pipe without removing the pattern ordisconnecting the chill-plate from the flask or disturbing it in anyway; and the objects of my improvement are, first, to form the bead by amechanical apparatus which is contained. within and is a part of thepattern itself; second, to form the bead in the sand of the mold so thatthe bead on the cast pipe will not be chilled; third, to form the beadin the sand of the mold after the same has been rammed by the directpressure of the bead-formers on the sand, instead of by gouging orslicking it out;

fourth, to form a bead in the mold without removing pattern,disconnecting chill-plate, or disturbing it in any way. I attain theseobjects by the mechanism illustrated in the accompanying drawings, inwhich- Figure 1. is a vertical section of the entire machine. Fig. 2 isa cross-section of the machine, taken at A B, Fig. 1. Fig. 3 is acrosssection of the machine, taken at G D, Fig 1.

Fig. 4 is a detail axial section of the print 71 taken through one ofthe holes 0.

Similar letters refer to similar parts throughout the several views.

J is the main body of the pattern.

a is a cylinder of the same circumference as J, attached-to J, as seenin Fig. 1, and secured by bolts d (Z (Z to print 72..

Z) is a rod, having avcrtical motion, extending the whole length ofpattern, as seen in Fig. 1. The lower end of this rod has three arms, 0'0' r, with T-shaped cross-heads, as seen in Fig. 2, which slant on anangle of about sixteen degrees in toward the center of the bottom of rod1), as seen in Fig. 1, and fit into corresponding slots in plates f f f.

fff are three sliding plates which shape or form the bead in the mold,whose movement is guided by shoulders on plate as is seen in Fig. 2, andwhich are pushed out beyond or withdrawn within the outer circumferenceof cylinder a by the vertical movement of the slanting T-heads r r r inthe slots above mentioned as rod Z) is raised or lowered.

g is a loose circular plate working on a pivot in print h. It can berevolved about one sixth of a revolution, carrying with it plates f ff,by revolving rod 1), and is prevented from making a greater revolutionby bolts d d (Z,

seen in Fig. 2.

d d d are bolts securing cylinder to to printit, having shoulders, so asto allow plate 9 to turn freely, and so placed as to prevent g fromrevolving more than about one-sixth of a revolution, as is seen in Fig.2.

h is a print fitting into chill-plate 2', so constructed that the wholeweight of pattern rests on the shoulder at the bottom of thechill-plate.

c c c are holes perforating print h, and leading into center hole, 0, toallow any loose sand to escape, as is seen in Fig. 1.

2 is a chill plate having a shoulder at the bottom to sustain the weightof pattern, instead of allowing it to come upon the upper surface ofchill-plate. (See Fig. 1.)

n is a collar on rod 1) to prevent rod 1) from being raised too far.

is a lug on rod 1), guided by slots Q and P, (see Fig. 3,) to preventrodl) from being revolved in. the process of raising or lowering it.(See Fig. 1.)

m is an eye attached to rod Z) as a convenience in raising or loweringit. (See Fig. 1.)

'When rod l) rests on plate 9, as seen in Fig. 1, the plates fff areextended beyond the outer circumference of cylinder a, forming as muchof head as is seen, Fig. 2. When the pattern stands in this position,the sand is rammed in the mold. To complete the remaining portion of thehead, the rod Z7 is raised by eye on, thus causingbead-formers fff, bythe action of the slanting heads 0' r r in the slots in fff, to comewithin the outer circumference of a. \Vhen collar it strikes against thebody J, the lug 70 being above the slot P, the rod Z) is revolved aboutone-sixth of a revolution, so that lug kfalls in slot Q. (See Fig. Thiscauses plate g and bead-formers f f f to make the same revolution.Rod 1) being again lowered, the slanting heads 7 r '1- causebead-formers fff to protrude .at the incompleted portions of the bead,pressing back the sand, thus completing the entire bead in the mold. Thepattern is drawn from the mold by raising rod 19, causing formers fff torecede, as before described, until collar n strikes against body J, whendrawing is continued until the Whole pattern is Withdrawn.

I am aware that prior to my invention apparatus has been constructed forforming molds for casting pipe, also apparatus for forming beads at theend of molds. I therefore do not claim an apparatus for forming moldsand beads in molds for casting pipe, broadly; but

WhatI do claim, and desire to secure by Letters Patent, is

1. A mechanical apparatus or pattern for forming molds for casting pipe,consisting of the casing a and J, an operating-rod, I), having inclinedT-shaped heads passing through said casing, sliding female bead-formersf f f, having inclined slots, rotary shouldered plate g, capable ofbeing revolved about one-sixth of a revolution Within casing a,shouldered bolts (1 d d, print h, and chill-plate 'L', to operate as andfor the purposes'specified.

2. The combination, in an apparatus for forming pipe-molds, of cylindera and J, having slots P Q, vertical sliding rod 1), having eye m, collarh, lug K, and T-shaped inclined heads With sliding bead-formers f f f,having inclined slots, rotary plate g, shouldered bolts d d cl, print h,and chill-plate i, to operate as and for the purposes specified.

A. C. BRUCE.

Witnesses:

FRANK D; ARTHUR, A. O. KELLY.

